John b



1.;13. CORNELL. METALLIC SLAT SHUTTER.

No. 11,663. Patented Sept. 12, 1854.

UNITED sTATE's JOHN B. CORNELL, OF NEW YORK, N. Y.

METALLIC SLAT-SHUTTER.

Specification of Letters Patent No.

To all whom, it may concern:

Be it known that I, JOHN B. CORNELL, of the city, county, and State ofNew York, have invented a'neW and Improved Metallic Slat-Shutter; and Ido hereby declare that the following is a full and exact descriptionthereof, reference being had to the accompanying drawings, making partof this specification, Figure 1 being an edge view of a portion of ashutter, and Fig. 2 a front or side View of the same on a smaller scale.

Like letters designate corresponding parts in both figures.

The nature of my invention consists in the improved manner of unitingthe sheet metal slats of the shutter, viz :by swaging the edges of theslats into forms of corresponding segments of circles, and connect ingthem by means of hinged bars combined with said slats and arranged insuch a man ner that the pivots of said hinges will be concentric withthe segmental curves of the edges of the slats, and also cause-the fiatportions of said slats, when the shutter is open, to be directly in linewith each other, substantially in the manner and for the purposeshereinafter set forth.

The several slats A, A, &c., which compose the shutter, have theiradjacent edges swaged into forms of semicircles a, a, &c., or, ifdesired, other arcs of circles, greater or less than semicircles; saidcorrugations being of a convenient diameter, (say, half an inch,) andarranged so that one half of them will respectively fit into thecorresponding corrugations of the adjacent slats, as represented inFig. 1. These slats are united by means of two series of sheet metallinks, or bars, B, B, &c., riveted to their flat portions, and connectedwith one another by hinges b, b, &c., precisely concentric with thecorrugations a, a, &c., of the slats; so that, as the slats turn on saidhinges, each corrugation will slide freely on its fellow and, at thesame time, retain a close joint therewith. The links or bars, and theirpivots, are so arranged that the fiat surfaces of all the slats shall,when the shutter is open, or extended, lie in the same 11,663, datedSeptember 12, 1854.

plane, as represented. The terminating edges of the corrugations of theslats are also arranged so that they will just allow the shutter to beopened to a straight line, and then abut against the adjacent slats, oragainst the links B, B, 800., so as to prevent any further bending inthat direction, as shown in Fig. 1. But in the other direction the slatswill turn sufliciently to allow the shutter to be rolled or foldedtogether compactly.

My improved shutter, as above described, possesses the followingadvantages over any other sheet metal shutter :first, all thecorrugations a, a, &c., being on one side, and the flat portions of theslats, when spread out, being in the same plane, the shutter, when open,presents a plane surface on one side, so that it will fit closelyagainst any window, or door, frame, while the corrugations projecting atregular distances on the outside thereof, not only cause noinconvenience, but give an ornamental appearance to the shutter.Secondly, the slats turn more freely on the hinges thus arranged, and atthe same time, possess closer and firmer oints,

l/Vhat I claim as my invention and desire to secure by Letters Patent,is

The improved manner of uniting the sheet metal slats of the shutter, viz:by swaging the edges of the slats into forms of corresponding segmentsof circles, and connecting them by means of hinged bars combined withsaid slats and arranged insuch a manner that the pivots of said hingeswill be concentric with the segmental curves of the edges of the slats,and also cause the flat portions of said slats, when the shutter isopen, to be directly in line with each other, substantially in themanner and for the purposes herein set forth.

The above specification of my improved metallic slat shutter, signed andwitnessed this 13th day of April 1854.

' JOHN B. CORNELL.

Witnesses R. S. FOSTER, J. S. BROWN.

